body {
  padding: 20px;
}
section {
  width: 500px;
}
/* 设置按钮行的样式 */
.row1 {
  margin-top: 40px;
  display: flex;
}
.row1 img {
  height: 100%;
  width: 100%;
}
.row1 .preview-box {
  padding-left: 15px;
  flex-direction: column;
  flex: 1;
  align-items: center;
}
.row1 .preview-box #chooseImage {
  margin-top: 20px;
  margin-left: 53px;
}
.row1 .cropper-box {
  width: 400px;
  height: 280px;
  background-color: cyan;
  overflow: hidden;
}
.row1 .cropper-box .size {
  font-size: 12px;
  color: gray;
  text-align: center;
}
.row1 .w100 {
  overflow: hidden;
  width: 200px;
  height: 140px;
  background-color: gray;
}
.row2 {
  display: flex;
  justify-content: flex-start;
  margin-top: 20px;
}
